Abstract: This article utilizes the terrain characteristics of mountainous canyon cities in Panzhihua City, and sets up observation points at different altitudes to obtain continuous temperature observation data for one year. Through statistics and analysis, it was found that the frequency of inversion in Panzhihua City reached 93.0% throughout the year, with an average inversion thickness of 123 meters and an average inversion intensity of 1.9 ℃. The inversion in the first and fourth quarters of the year was significantly stronger than that in the second and third quarters. The inversion frequency was the lowest in the middle of the observation area at an altitude of 1519～1650 meters and higher when it was higher or lower than that altitude. There is a significant difference in the occurrence of temperature inversion at different altitudes at different times of the day. Temperature inversion mainly occured at night in areas with elevations of 1252～1519 meters,while temperature inversion mainly occured during the day in areas with adjacent lower altitudes of 1194～1252 meters. Understanding these temperature inversion phenomena helps to further conduct environmental air quality impact analysis.